667506403207 has 6 divisors (see below), whose sum is σ = 762866931224. Its totient is φ = 572146492800.

The previous prime is 667506403147. The next prime is 667506403243. The reversal of 667506403207 is 702304605766.

It is not a de Polignac number, because 667506403207 - 2¹⁵ = 667506370439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667506400207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2007207 + ... + 2316007.

Almost surely, 2^667506403207 is an apocalyptic number.

667506403207 is a deficient number, since it is larger than the sum of its proper divisors (95360528017).

667506403207 is an frugal number, since it uses more digits than its factorization.

667506403207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617609 (or 308808 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 46.

The spelling of 667506403207 in words is "six hundred sixty-seven billion, five hundred six million, four hundred three thousand, two hundred seven".